EP4135014A1 - Solar cells for shingled solar cell module, shingled solar cell module, and method of making solar cells - Google Patents

Solar cells for shingled solar cell module, shingled solar cell module, and method of making solar cells Download PDF

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Publication number
EP4135014A1
EP4135014A1 EP22198446.1A EP22198446A EP4135014A1 EP 4135014 A1 EP4135014 A1 EP 4135014A1 EP 22198446 A EP22198446 A EP 22198446A EP 4135014 A1 EP4135014 A1 EP 4135014A1
Authority
EP
European Patent Office
Prior art keywords
solar cell
front side
busbar
edge
busbars
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22198446.1A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bingwei YIN
Jun Sun
Zhengrong ZHANG
Dengyun Chen
Shiyin DING
Fushen ZHOU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tongwei Solar Hefei Co Ltd
Original Assignee
Chengdu Yefan Science and Technology Co Ltd
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Filing date
Publication date
Application filed by Chengdu Yefan Science and Technology Co Ltd filed Critical Chengdu Yefan Science and Technology Co Ltd
Publication of EP4135014A1 publication Critical patent/EP4135014A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/02002—Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • H01L31/0201—Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules comprising specially adapted module bus-bar structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/02016—Circuit arrangements of general character for the devices
    • H01L31/02019—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/02021—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/022433—Particular geometry of the grid contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/05—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells
    • H01L31/0504—Electrical interconnection means between PV cells inside the PV module, e.g. series connection of PV cells specially adapted for series or parallel connection of solar cells in a module
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present disclosure relates to solar cells for a shingled solar cell module, a shingled solar cell module, and a method of making the solar cells for the shingled solar cell module.
  • the shingled solar cell string does not have a sufficient cell-conductive adhesive-cell connection at the corresponding positions.
  • the effective width of the busbar of the solar cell strip at the edge of the solar cell is shorter than that of the middle.
  • An object of the present disclosure is to provide a solar cell for a shingled solar cell module, which can overcome the deficiencies of the prior art.
  • a solar cell for a shingled solar cell module having a front side and a back side, a plurality of front side busbars being arranged on the front side, a plurality of back side busbars being arranged on the back side, the solar cell comprising a plurality of sections, each section comprising a front side busbar and a back side busbar located at edges thereof, the front side busbar and/or back side busbar of at least one section of the solar cell having an extension at one end or both ends, the extension extending along another edge of said at least one section intersecting with the edges.
  • the present disclosure by extending the front side busbar, increases the current collecting capability of the busbar, thereby improving the efficiency of the shingled solar cell module.
  • the solar cell has chamfered corners, and an extension of the front side busbar and/or back side busbar of at least one chamfered section of the solar cell having a chamfer extends along another edge of the chamfered section intersecting with the edges of the section where the front side busbar and/or back side busbar locates.
  • the front side busbar and/or back side busbar are along a long edge of a chamfer-free side of the chamfered section
  • the front side busbar and/or back side busbar after the front side busbar and/or back side busbar reach another edge of the chamfered section orthogonal with the long edge, namely, a short edge of the chamfered section, the front side busbar and/or back side busbar continues to extend along the short edge.
  • the busbar in the chamfered portion is extended so that the current collecting capacity of the busbar at the chamfered portion is enhanced, thereby improving the EL imaging of the shingled solar cell module and improving the efficiency of the chamfered module.
  • the extension may extend along an entire area of the another edge of the chamfered section and continue to extend along a partial or entire area of a further edge of the chamfered section that abuts against the another edge.
  • the front side busbar is along the long edge of the chamfer-free side of the chamfered section
  • the front side busbar after the front side busbar reaches other edge of the chamfered section perpendicular to the long edge, i.e., a short edge of the chamfered section, the front side busbar continues to extend along the entire area of the short edge and continues to extend along another edge of the chamfered section that abuts against the short edge, i.e., extend along a partial or entire area of the chamfered edge.
  • the extension may extend linearly with a constant width or with a non-constant width.
  • the plurality of front side busbars are distributed unevenly spaced apart on the front side.
  • the plurality of front side busbars may include two front side busbars which are adjacent to each other, and the two front side busbars are not close to the edges of the solar cell with respect to other front side busbars.
  • the plurality of front side busbars may include two pairs of front side busbars, and two front side busbars of each pair of the two pairs of front side busbars are adjacent to each other, and one pair of the two pairs of front side busbars are close to the edge of the solar cell, and the other pair of the two pairs of front side busbars are not close to the edge of the solar cell.
  • the distribution of the plurality of back side busbars may correspond to the distribution of the plurality of front side busbars, such that after the solar cell is split into a plurality of solar cell strips, the front side busbar is adjacent to a long edge and an adjacent short edge of a corresponding solar cell strip, and the back side busbar is adjacent to an opposite long edge of the corresponding solar cell strip.
  • a shingled solar cell module which is fabricated from solar cell strips split from the solar cell according to any of the above embodiments.
  • a method for fabricating a solar cell for a shingled solar cell module comprises: arranging a plurality of back side busbars on a front side and a back side, the plurality of busbars dividing the solar cell into a plurality of sections, each section comprising a front side busbar and a back side busbar located at edges thereof, the busbar of at least one section of the solar cell having an extension at one end or both ends thereof, the extension extending along another edge of said at least one section intersecting with the edges.
  • the solar cell in the method of fabricating a solar cell for a shingled solar cell module according to the present disclosure, has chamfers, and an extension of the busbar of at least one chamfered section of the solar cell having a chamfer extends along another edge of the chamfered section intersecting with the edge where the busbar locates.
  • the extension in the method of making a solar cell for a shingled solar cell module according to the present disclosure, the extension may extends linearly with a constant width or with a non-constant width.
  • the plurality of busbars may be a plurality of front side busbars.
  • the plurality of busbars may be a plurality of back side busbars.
  • the plurality of front side busbars are distributed unevenly spaced apart on the front side.
  • the plurality of front side busbars may include two front side busbars which are adjacent to each other, and the two front side busbars are not close to the edge of the solar cell with respect to other front side busbars.
  • the plurality of front side busbars may include two pairs of front side busbars, and two front side busbars of each pair of the two pairs of front side busbars are adjacent to each other, and the two pairs of front side busbars are respectively close to one edge of the solar cell.
  • the plurality of front side busbars may include two front side busbars which are adjacent to each other, and the two front side busbars are close to the edge of the solar cell.
  • the plurality of front side busbars may include two pairs of front side busbars, and two front side busbars of each pair of the two pairs of front side busbars are adjacent to each other, and one pair of the two pairs of front side busbars are close to the edge of the solar cell, and the other pair of the two pairs of front side busbars are not close to the edge of the solar cell.
  • the busbar of at least one section of the solar cell having an extension at one end or both ends thereof is the front side busbar.
  • the design of extending the busbar in the chamfered portion it is possible to increase the current collecting capability of the busbar at the chamfered portion, thereby improving the EL imaging of the chamfered shingled solar cell module and improving the efficiency of the shingled solar cell module.
  • a plurality of front side busbars 101, 102, 103, 104, 105 are arranged on a front side of the solar cell, and a plurality of back side busbars 106, 107, 108, 109, 110 are arranged on a back side of the solar cell.
  • the distribution of the plurality of back side busbars 106, 107, 108, 109, 110 corresponds to the distribution of the plurality of front side busbars 101, 102, 103, 104, 105 in such a manner that after the solar cell 100 is split into solar cell strips, each solar cell strip has a front side busbar on one side and a back side busbar on the opposite side.
  • the effective width of the busbar of the chamfered solar cell strip at the edge of the solar cell is shorter than at the middle, so when it is used to make the shingled solar cell module, the current collecting path of the chamfered part is longer and the resistance is higher, which causes the area to be darker than the middle in the EL imaging, affecting the power output of the module.
  • FIG. 3 and FIG. 4 show a front side and a back side of a solar cell according to a preferred embodiment of the present disclosure in a top view and a bottom view, respectively.
  • the illustrated solar cell 200 is formed by slicing a square rod chamfered at four edges, so that the solar cell has a substantially square shape with four corners chamfered as viewed from the front side and the back side. That is, the solar cell 200 has chamfers 221, 222, 223, and 224.
  • a plurality of mutually parallel front side busbars 201, 202, 203, 204, 205 parallel to two of the edges of the solar cell are disposed on the front side, and a plurality of mutually parallel back side busbars 206, 207, 208, 209, 210 parallel to the same two edges of the solar cell are disposed on the back side.
  • the solar cell includes a plurality of juxtaposed sections 231, 232, 233, 234, 235, and each section includes one front side busbar and one back side busbar.
  • the plurality of front side busbars 201, 202, 203, 204, 205 are distributed unevenly spaced apart on the front side.
  • the plurality of front side busbars 201, 202, 203, 204, 205 include two front side busbars 202, 203 which are adjacent to each other, and the two front side busbars 202, 203 are not close to the edge of the solar cell with respect to other front side busbars.
  • two front side busbars 202, 203 are located on the section close to the center of the solar cell.
  • the plurality of front side busbars may be distributed evenly spaced apart on the front side, and the front side busbar may be close to the edge of the solar cell.
  • the first solar cell strip has a front side busbar 201 and a back side busbar 206
  • the second solar cell strip has a front side busbar 202 and a back side busbar 207
  • the third solar cell strip has a front side busbar 203 and a back side busbar 208
  • the fourth solar cell strip has a front side busbar 204 and a back side busbar 209
  • the fifth solar cell strip has a front side busbar 205 and a back side busbar 210.
  • each of the first to fifth solar cell strips has a front side busbar on a long edge and a back side busbar on an opposite long edge
  • at least one solar cell strip in the first to fifth solar cell strips has a front side busbar at the long edge on one side and a short edge intersecting therewith, that is, has a busbar at the long edge and has an extension of the busbar at a short edge intersecting therewith.
  • the two outermost solar cell strips of the first to fifth solar cell strips that is, the first solar cell strip and the fifth solar cell strip have chamfers.
  • the first solar cell strip is also the left side chamfered section 231
  • the fifth solar cell strip is also the right side chamfered section 235.
  • the front side busbar 201 of the left side chamfered section 231 having a chamfer extends along the long edge on the side without chamfer, and after reaching the short edge intersecting (orthogonal in the present embodiment in the figure) the long edge, the front side busbar 201 continues to extend along the short edge, i.e., has an extension 211 of the busbar.
  • the extension of the busbar is located on the lower short edge that intersects the long edge of the solar cell strip.
  • the extension of the busbar may be disposed at the short edge on either side or at both the upper short edge and lower short edge which intersect with the long edge.
  • FIG. 6 and FIG. 7 show a front side and a back side of a solar cell 300 according to another preferred embodiment of the present disclosure in a top view and a bottom view, respectively.
  • the illustrated solar cell 300 is formed by slicing a square rod chamfered at four edges, so that the solar cell has a substantially square shape with four corners chamfered as viewed from the front side and the back side. That is, the solar cell 300 has chamfers 321, 322, 323, and 324.
  • a plurality of mutually parallel front side busbars 301, 302, 303, 304, 305 parallel to two of the edges of the solar cell are disposed on the front side, and a plurality of mutually parallel back side busbars 306, 307, 308, 309, 310 parallel to the same two edges of the solar cell are disposed on the back side.
  • the solar cell includes a plurality of juxtaposed sections 331, 332, 333, 334, 335, and each section includes one front side busbar and one back side busbar.
  • the front side busbar 301 of the chamfered left section 331 extends along the long edge on the side without chamfer, and after reaching the short edge intersecting the long edge, the front side busbar 301 continues to extend along the short edge, i.e., has an extension 311 of the busbar.
  • FIG. 8 shows a partial enlarged view showing a chamfered 321 area of the solar cell.
  • the extension 311 of the busbar 301 can be more clearly seen in FIG. 8 .
  • the extension 311 extends along an entire area of the short edge 331-1 of the chamfered section 331 and continues to extend along the chamfered edge 331-2 of the chamfered section 331.
  • FIG. 9 and FIG. 10 show a front side and a back side of a solar cell 400 according to a preferred embodiment of the present disclosure in a top view and a bottom view, respectively.
  • the illustrated solar cell 400 is formed by slicing a square rod chamfered at four edges, so that the solar cell has a substantially square shape with four corners chamfered as viewed from the front side and the back side. That is, the solar cell 400 has chamfers 421, 422, 423, and 424.
  • a plurality of mutually parallel front side busbars 401, 402, 403, 404, 405 parallel to two of the edges of the solar cell are disposed on the front side, and a plurality of mutually parallel back side busbars 406, 407, 408, 409, 410 parallel to the same two edges of the solar cell are disposed on the back side.
  • the solar cell includes a plurality of juxtaposed sections 431, 432, 433, 434, 435, and each section includes one front side busbar and one back side busbar.
  • the distribution of the plurality of back side busbars 406, 407, 408, 409, 410 corresponds to the distribution of the plurality of front side busbars 401, 402, 403, 404, 405 in such a manner that after the solar cell 400 is split into a plurality of solar cell strips with the above-mentioned sections, each of the solar cell strips has a front side busbar at a long edge and a back side busbar at an opposite long edge. As shown in FIG. 9 and FIG. 10 , the solar cell 400 may be split into five solar cell strips. According to the sequence shown in FIGS.
  • each of the first to fifth solar cell strips has a front side busbar at a long edge and a back side busbar at an opposite long edge
  • at least one solar cell strip in the first to fifth solar cell strips has a front side busbar at the long edge on one side and a short edge intersecting therewith, that is, has a busbar at the long edge and has an extension of the busbar at a short edge intersecting therewith.
  • the two outermost solar cell strips of the first to fifth solar cell strips that is, the first solar cell strip and the fifth solar cell strip have chamfers.
  • the first solar cell strip is also the left side chamfered section 431
  • the fifth solar cell strip is also the right side chamfered section 435.
  • the extension 411 extends towards the chamfer 421 along the intersecting short edge 431-1 of the chamfered section 431.
  • the extension 411 may extend all the way to the chamfer 421 or may extend only along a partial area of the intersecting short edge 431-1 of the chamfered section 431.
  • the extension 411 may be linearly and not gradually varied, that is, have a constant width, or may be linearly and gradually varied, that is, have a variable width.
  • the extension of the busbar is located on the lower short edge that intersects the long edge of the solar cell strip.
  • the extension of the busbar may be disposed at the short edge on either side or at both the upper short edge and lower short edge which intersect with the long edge.
  • a plurality of mutually parallel front side busbars 501, 502, 503, 504, 505 parallel to two of the edges of the solar cell are disposed on the front side, and a plurality of mutually parallel back side busbars 506, 507, 508, 509, 510 parallel to the same two edges of the solar cell are disposed on the back side.
  • the arrangement of the plurality of front side busbars and the plurality of back side busbars is the same as that of the embodiment shown in FIG. 7 and FIG. 8 , and details are not described herein again.
  • the front side busbar 501 of the left side chamfered section 531 extends along the long edge on the side without chamfer, and after reaching the short edge intersecting the long edge, the front side busbar 501 continues to extend along the short edge, i.e., has an extension 511 of the busbar.
  • the extension 511 extends along an entire area of the short edge 531-1 of the chamfered section 531 and continues to extend along the chamfered edge 531-2 of the chamfered section 531.
  • the extension 511 may extend along the entire area of the chamfered edge 531-2 or may extend only along a partial area of the chamfered edge 531-2.
  • the extension 511 may be linearly and not gradually varied, that is, have a constant width, or may be linearly and gradually varied, that is, have a variable width.
  • the front side busbar 505 of the fifth solar cell strip namely, of the right side chamfered section 523 extends along the long edge of the side without a chamfer, and after reaching the short edge intersecting with the long edge, the front side busbar 505 continues to extend along the short edge, i.e., has an extension of the busbar, the extension extends along the short edge of another chamfered section 523, the extension may extend all the way to the chamfer 522, or may extend only along a partial area of the short edge of another chamfered section 523 without extending to the chamfer 522. Further preferably, the extension of the busbar 505 may extend along the entire short edge of the another chamfered section 523 and continue to extend along a partial or entire area of the chamfered edge of the another chamfered section 523.
  • a plurality of mutually parallel front side busbars 601, 602, 603, 604, 605 parallel to two of the edges of the solar cell are disposed on the front side, and a plurality of mutually parallel back side busbars 606, 607, 608, 609, 610 parallel to the same two edges of the solar cell are disposed on the back side.
  • the solar cell includes a plurality of juxtaposed sections 631, 632, 633, 634, 635, and each section includes one front side busbar and one back side busbar.
  • the plurality of front side busbars 601, 602, 603, 604, 605 are distributed unevenly spaced apart on the front side.
  • the plurality of front side busbars 601, 602, 603, 604, 605 include two front side busbars 604, 605 which are adjacent to each other, and the two front side busbars 604, 605 are close to the edge of the solar cell with respect to other front side busbars.
  • two front side busbars 604, 605 are located on the section at the outermost edge.
  • the first solar cell strip has a front side busbar 601 and a back side busbar 606
  • the second solar cell strip has a front side busbar 602 and a back side busbar 607
  • the third solar cell strip has a front side busbar 603 and a back side busbar 608
  • the fourth solar cell strip has a front side busbar 604 and a back side busbar 609
  • the fifth solar cell strip has a front side busbar 605 and a back side busbar 610.
  • each of the first to fifth solar cell strips has a front side busbar at a long edge and a back side busbar at an opposite long edge
  • at least one solar cell strip in the first to fifth solar cell strips has a front side busbar at the long edge on one side and a short edge intersecting therewith, that is, has a busbar at the long edge and has an extension of the busbar at a short edge intersecting therewith.
  • the two outermost solar cell strips of the first to fifth solar cell strips that is, the first solar cell strip and the fifth solar cell strip have chamfers.
  • the first solar cell strip is also the left side chamfered section 631
  • the fifth solar cell strip is also the right side chamfered section 635.
  • the front side busbar 601 of the left side chamfered section 631 extends along the long edge on the side without chamfer, and after reaching the short edge intersecting (orthogonal in the present embodiment in the figure) the long edge, the front side busbar 601 continues to extend along the short edge, i.e., has an extension 611 of the busbar. As shown, the extension 611 extends along the short edge 631-1 of the chamfered section 631.
  • the extension 611 may extend all the way to the chamfer 621 or may extend only along a partial area of the short edge 631-1 without extending to the chamfer 621.
  • the extension 611 may be linearly and not gradually varied, that is, have a constant width, or may be linearly and gradually varied, that is, have a variable width.
  • the front side busbar 605 of the fifth solar cell strip namely, of the right side chamfered section 635 extends along the long edge of the side without a chamfer, and after reaching the short edge intersecting (orthogonal in the present embodiment in the figure) with the long edge, the front side busbar 605 continues to extend along the short edge, i.e., has an extension of the busbar, the extension extends along the short edge of the right side chamfered section 635, the extension may extend all the way to the chamfer 622, or may extend only along a partial area of the short edge without extending to the chamfer 622.
  • the extension of the busbar is located on the lower short edge that intersects the long edge of the solar cell strip.
  • the extension of the busbar may be disposed at the short edge on either side or at both the upper short edge and lower short edge which intersect with the long edge.
  • FIG. 15 and FIG. 16 show a front side and a back side of a solar cell 700 according to another preferred embodiment of the present disclosure in a top view and a bottom view, respectively.
  • the illustrated solar cell 700 is formed by slicing a square rod chamfered at four edges, so that the solar cell has a substantially square shape with four corners chamfered as viewed from the front side and the back side. That is, the solar cell 700 has chamfers 721, 722, 723, and 724.
  • a plurality of mutually parallel front side busbars 701, 702, 703, 704, 705 parallel to two of the edges of the solar cell are disposed on the front side, and a plurality of mutually parallel back side busbars 706, 707, 708, 709, 710 parallel to the same two edges of the solar cell are disposed on the back side.
  • the solar cell includes a plurality of juxtaposed sections 731, 732, 733, 734, 735, and each section includes one front side busbar and one back side busbar.
  • the front side busbar 701 of the left side chamfered section 731 extends along the long edge on the side without chamfer, and after reaching the short edge intersecting (orthogonal in the embodiment in the figure) the long edge, the front side busbar 701 continues to extend along the short edge, i.e., has an extension 711.
  • the extension 711 extends along an entire area of the short edge 731-1 of the chamfered section 731 and continues to extend along the chamfered edge 731-2 of the chamfered section 731.
  • the extension 711 may extend along the entire area of the chamfered edge 731-2 or may extend only along a partial area of the chamfered edge 731-2.
  • the extension 711 may be linearly and not gradually varied, that is, have a constant width, or may be linearly and gradually varied, that is, have a variable width.
  • the busbar 705 of another chamfered section 735 may also have an extension that may extend along the short edge of the another chamfered section 735.
  • the extension extends all the way to the chamfer 722, or may extend only along a partial area of the right-angle short edge of the another chamfered section 735 without extending to the chamfer 722.
  • the extension of the busbar 705 may extend along the entire short edge of the another chamfered section 735 and continue to extend along a partial or entire area of the chamfered edge of the another chamfered section 735.
  • a plurality of mutually parallel front side busbars 801, 802, 803, 804, 805 parallel to two of the edges of the solar cell are disposed on the front side, and a plurality of mutually parallel back side busbars 806, 807, 808, 809, 810 parallel to the same two edges of the solar cell are disposed on the back side.
  • the solar cell includes a plurality of juxtaposed sections 831, 832, 833, 834, 835, and each section includes one front side busbar and one back side busbar.
  • the distribution of the plurality of back side busbars 806, 807, 808, 809, 810 corresponds to the distribution of the plurality of front side busbars 801, 802, 803, 804, 805 in such a manner that after the solar cell 400 is split into a plurality of solar cell strips with the above-mentioned sections, each of the solar cell strips has a front side busbar at a long edge on one side and a back side busbar at a long edge on the other side, and at least one solar cell strip has a front side busbar at the long edge on one side and a short edge intersecting therewith. As shown in FIG. 17 and FIG. 18 , the solar cell 800 may be split into five solar cell strips. According to the sequence shown in FIGS.
  • the first solar cell strip has a front side busbar 801 and a back side busbar 806, the second solar cell strip has a front side busbar 802 and a back side busbar 807, the third solar cell strip has a front side busbar 803 and a back side busbar 808, and the fourth solar cell strip has a front side busbar 804 and a back side busbar 809, and the fifth solar cell strip has a front side busbar 805 and a back side busbar 810.
  • each of the first to fifth solar cell strips has a front side busbar at a long edge on one side and a back side busbar at the long edge on the other side
  • at least one solar cell strip in the first to fifth solar cell strips has a front side busbar at the long edge on one side and a short edge intersecting therewith, that is, has a busbar at the long edge and has an extension of the busbar at a short edge intersecting with the long edge.
  • the two outermost solar cell strips of the first to fifth solar cell strips that is, the first solar cell strip and the fifth solar cell strip have chamfers.
  • the first solar cell strip is also the left side chamfered section 831
  • the fifth solar cell strip is also the right side chamfered section 835.
  • the front side busbar 801 of the left side chamfered section 831 extends along the long edge on the side without chamfer, and after reaching the short edge intersecting (orthogonal in the present embodiment in the figure) the long edge, the front side busbar 801 continues to extend along the short edge, i.e., has an extension 811.
  • the extension 811 extends towards the chamfer 821 along the short edge 831-1 of the chamfered section 831.
  • the extension 811 may extend all the way to the chamfer 821 or may extend only along a partial area of the short edge 831-1 of the chamfered section 831 without extending to the chamfer 821.
  • the extension 811 may be linearly and not gradually varied, that is, have a constant width, or may be linearly and gradually varied, that is, have a variable width.
  • the front side busbar 805 of the fifth solar cell strip namely, of the right side chamfered section 835 extends along the long edge of the side without a chamfer, and after reaching the short edge intersecting (orthogonal in the embodiment in the figure) with the long edge, the front side busbar 805 continues to extend along the short edge, i.e., has an extension, the extension extends along the short edge of the right side chamfered section 835, the extension may extend all the way to the chamfer 822, or may extend only along a partial area of the short edge of another chamfered section 835 without extending to the chamfer 822.
  • FIG. 19 and FIG. 20 show a front side and a back side of a solar cell 900 according to a preferred embodiment of the present disclosure in a top view and a bottom view, respectively.
  • the illustrated solar cell 900 is formed by slicing a square bar chamfered at four edges, so that the solar cell has a substantially square shape with four corners chamfered as viewed from the front side and the back side. That is, the solar cell 900 has chamfers 921, 922, 923, and 924.
  • a plurality of mutually parallel front side busbars 901, 902, 903, 904, 905 parallel to two of the edges of the solar cell are disposed on the front side, and a plurality of mutually parallel back side busbars 906, 907, 908, 909, 910 parallel to the same two edges of the solar cell are disposed on the back side.
  • the arrangement of the plurality of front side busbars and the plurality of back side busbars is the same as that of the embodiment shown in FIG. 19 and FIG. 20 , and details are not described herein again.
  • the front side busbar 901 of the left side chamfered section 931 extends along the long edge on the side without chamfer, and after reaching the short edge intersecting the long edge, the front side busbar 901 continues to extend along the short edge, i.e., has an extension 911.
  • the extension 911 extends along an entire area of the short edge 931-1 of the chamfered section 931 and continues to extend along the chamfered edge 931-2 of the chamfered section 931.
  • the extension 911 may extend along the entire area of the chamfered edge 931-2 or may extend only along a partial area of the chamfered edge 931-2.
  • the extension 911 may be linearly and not gradually varied, that is, have a constant width, or may be linearly and gradually varied, that is, have a variable width.
  • the front side busbar 905 of the fifth solar cell strip namely, of the right side chamfered section 923 extends along the long edge of the side without a chamfer, and after reaching the short edge intersecting with the long edge, the front side busbar 905 continues to extend along the short edge, i.e., has an extension, the extension extends along the short edge of another chamfered section 935, the extension may extend all the way to the chamfer 922, or may extend only along a partial area of the short edge of another chamfered section 935 without extending to the chamfer 922. Further preferably, the extension of the busbar 905 may extend along the entire short edge of the another chamfered section 923 and continue to extend along a partial or entire area of the chamfered edge of the another chamfered section 935.
  • FIG. 21 shows a flow chart of a method of making a solar cell for a shingled solar cell module in accordance with the present disclosure. The method includes the following steps:
  • the extension of the front side busbar may extend along a partial or entire area of the short edge of the chamfered section. Further preferably, the extension may extend along the entire area of the short edge of the chamfered section and continue to extend along a partial or entire area of the chamfered edge of the chamfered section.
  • the extension may be linearly and not gradually varied, or linearly and gradually varied.
  • each of the solar cell strips has a front side busbar at a long edge on one side and a back side busbar at a long edge on the other side, and at least one solar cell strip in the solar cell strips has a busbar (front side busbar and/or back side busbar) at the long edge on one side and a short edge intersecting therewith, that is to say, has a busbar at the long edge and has an extension of the busbar at a short edge intersecting with the long edge.
  • a busbar front side busbar and/or back side busbar
  • a solar cell for a shingled solar cell module said solar cell having a front side and a back side, a plurality of front side busbars being arranged on the front side, a plurality of back side busbars being arranged on the back side,
  • Clause 2 The solar cell according to clause 1, wherein the solar cell has chamfers, and an extension of the front side busbar and/or back side busbar of at least one chamfered section of the solar cell extends along another edge of the chamfered section intersecting with the edges of the section where the front side busbar and/or back side busbar locates.
  • Clause 3 The solar cell according to clause 2, wherein the extension extends along a partial or entire area of the another edge of the chamfered section.
  • Clause 5 The solar cell according to any of clauses 1-4, wherein the extension extends linearly with a constant width or with a non-constant width.
  • Clause 7 The solar cell according to clause 1, wherein the plurality of front side busbars are distributed unevenly spaced apart on the front side.
  • Clause 8 The solar cell according to clause 7, wherein the plurality of front side busbars include two front side busbars which are adjacent to each other, and the two front side busbars are not close to the edges of the solar cell with respect to other front side busbars.
  • Clause 9 The solar cell according to clause 7, wherein the plurality of front side busbars include two pairs of front side busbars, and two front side busbars of each pair of the two pairs of front side busbars are adjacent to each other, and the two pairs of front side busbars are respectively close to one edge of the solar cell.
  • Clause 10 The solar cell according to clause 7, wherein the plurality of front side busbars include two front side busbars which are adjacent to each other, and the two front side busbars are close to the edge of the solar cell.
  • Clause 11 The solar cell according to clause 7, wherein the plurality of front side busbars include two pairs of front side busbars, and two front side busbars of each pair of the two pairs of front side busbars are adjacent to each other, and one pair of the two pairs of front side busbars are close to the edge of the solar cell, and the other pair of the two pairs of front side busbars are not close to the edge of the solar cell.
  • Clause 12 The solar cell according to any of clauses 6-11, wherein the distribution of the plurality of back side busbars corresponds to the distribution of the plurality of front side busbars, such that after the solar cell is split into a plurality of solar cell strips, the front side busbar is adjacent to a long edge at one side and an adjacent short edge of a corresponding solar cell strip, and the back side busbar is adjacent to a long edge at the other side.
  • Clause 13 A shingled solar cell module which is made from solar cell strips split from solar the cell according to any of clauses 1-12.
  • Clause 14 A method of making a solar cell for a shingled solar cell module, the method comprising: arranging a plurality of busbars on a front side and a back side, the plurality of busbars dividing the solar cell into a plurality of sections, each section comprising a front side busbar and a back side busbar located at edges thereof, the busbar of at least one section of the solar cell having an extension at one end or both ends thereof, the extension extending along another edge of said at least one section intersecting with the edges.
  • Clause 15 The method according to clause 14, wherein the solar cell has chamfers, and an extension of the busbar of at least one chamfered section of the solar cell having a chamfer extends along another edge of the chamfered section intersecting with the edge where the busbar locates.
  • Clause 16 The method according to clause 15, wherein the extension extends along a partial or entire area of the another edge of the chamfered section.
  • Clause 17 The method according to clause 16, wherein the extension extends along an entire area of the another edge of the chamfered section and continue to extend along a partial or entire area of a further edge of the chamfered section that abuts against the another edge.
  • Clause 18 The method according to clause 14, wherein the extension extends linearly with a constant width or with a non-constant width.
  • Clause 19 The method according to clause 14, wherein the plurality of front side busbars are distributed evenly spaced apart on the front side.
  • Clause 20 The method according to clause 14, wherein the plurality of front side busbars are distributed unevenly spaced apart on the front side.
  • Clause 21 The method according to clause 20, wherein the plurality of front side busbars include two front side busbars which are adjacent to each other, and the two front side busbars are not close to the edges of the solar cell with respect to other front side busbars.
  • Clause 22 The method according to clause 20, wherein the plurality of front side busbars include two pairs of front side busbars, and two front side busbars of each pair of the two pairs of front side busbars are adjacent to each other, and the two pairs of front side busbars are respectively close to one edge of the solar cell.
  • Clause 23 The method according to clause 20, wherein the plurality of front side busbars include two front side busbars which are adjacent to each other, and the two front side busbars are close to the edge of the solar cell.
  • Clause 24 The method according to clause 20, wherein the plurality of front side busbars include two pairs of front side busbars, and two front side busbars of each pair of the two pairs of front side busbars are adjacent to each other, and one pair of the two pairs of front side busbars are close to the edge of the solar cell, and the other pair of the two pairs of front side busbars are not close to the edge of the solar cell.
  • Clause 25 The method according to any of clauses 20-24, wherein the busbar of at least one section of the solar cell having an extension at one end or both ends thereof is the front side busbar.
  • Clause 26 The method according to any of clauses 20-24, wherein the busbar of at least one section of the solar cell having an extension at one end or both ends thereof is the back side busbar.

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EP22198446.1A 2018-11-20 2018-12-06 Solar cells for shingled solar cell module, shingled solar cell module, and method of making solar cells Pending EP4135014A1 (en)

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CN201811385343.9A CN111276549B (zh) 2018-11-20 2018-11-20 用于叠瓦组件的电池片、叠瓦组件及制备电池片的方法
EP18899027.9A EP3686921B1 (en) 2018-11-20 2018-12-06 Cell sheet for imbricate assembly, imbricate assembly, and method for preparing cell sheet
PCT/CN2018/119519 WO2020103196A1 (zh) 2018-11-20 2018-12-06 用于叠瓦组件的电池片、叠瓦组件及制备电池片的方法

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CN115000199B (zh) * 2022-08-01 2022-10-25 一道新能源科技(衢州)有限公司 一种p型perc单面电池结构

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US10998453B2 (en) 2021-05-04
US10840389B2 (en) 2020-11-17
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US11018268B2 (en) 2021-05-25
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US11018267B2 (en) 2021-05-25
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